Stereo Automation?

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One of my buddies wants to build a remote control mechanism to turn the
volume control on his stereo. He imagines some kind of motor or servo
from an RC application that is somehow linked to a pulley which connects
to the volume knob with a rubber band or the like. It obviously needs to
move slow and steady yet it need not move a huge distance (if geared
properly). He doesn't want to use a huge RC radio to control it though.
He wants something much smaller. Any ideas? He knows that there are
boxes that can be added to a stereo that are essentially remote control
volume devices but he is an audiophile and wants to add nothing to his
system that might dirty the sound.

Re: Stereo Automation?
He is an "audiophile" that doesn't want to "add nothing to his system"  but
has a manual volume control on his stereo?

Does it use 25L6s for output?

This just sounds like a bad troll.

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One of my buddies wants to build a remote control mechanism to turn the
volume control on his stereo. He imagines some kind of motor or servo
from an RC application that is somehow linked to a pulley which connects
to the volume knob with a rubber band or the like. It obviously needs to
move slow and steady yet it need not move a huge distance (if geared
properly). He doesn't want to use a huge RC radio to control it though.
He wants something much smaller. Any ideas? He knows that there are
boxes that can be added to a stereo that are essentially remote control
volume devices but he is an audiophile and wants to add nothing to his
system that might dirty the sound.


Re: Stereo Automation?

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What the OP is asking for once was available in commercial production. A
Denon integrated amp that I have has an internal motor to turn the
volume knob by remote control.

Steve

--
steve <at> w0x0f <dot> com
"Life should not be a journey to the grave with the intention of
arriving safely in an attractive and well preserved body, but rather to
skid in sideways, chocolate in one hand, sidecar in the other, body thoroughly
used up, totally worn out and screaming "WOO HOO what a ride!"

Re: Stereo Automation?

Quoted text here. Click to load it

Ditto. The 10 or so y/o (purchased used) Magnavox system
I'm listening to right now (separate but joined boxes for
the tuner, CD player, and cassette tape deck) has a remote
control that causes the volume dial to physically rotate
as we watch it....

Annoyingly the original remote was replaced by a "universal",
so while we can adjust the volume, we can't change the
radio station from our chair....

--
_____________________________________________________
Knowledge may be power, but communications is the key
             dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]

Re: Stereo Automation?
On Thu, 28 Apr 2011 09:48:25 +0000 (UTC), David White

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Google Internet  and search eBay for "motorized potentiometer".

For example, IR control version here:
http://cgi.ebay.com/IR-CONTROL-REMOTE-SET-f-ALPS-motorized-potentiometer-/350430123941?pt=UK_Consumer_VintageAudio_RL&hash=item51974357a5

For his efforts, your friend may also get the crackles and pops and
rectification that sometimes go along with a mechanical passive voltage
divider.

... Marc
Marc_F_Hult
www.ECOntrol.org

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